The static permittivity of binary mixtures using an improved bruggeman model

Puranik, S. M.; Kumbharkhane, A.C.; Mehrotra, S. C.

doi:10.1016/0167-7322(93)00665-6

Cited by 165 publications

(47 citation statements)

References 7 publications

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“…[11] A solvent with a low dielectric constant makes the solution more supersaturated, which can increase the nucleation rate. [12] Theoretically, the dependence of the particle radius (r) on the ε of the solution can be expressed by using the electrostatic model, and the relationship between supersaturation and r can be expressed by using the Kelvin equation: [13] Eur.…”

Section: Resultsmentioning

confidence: 99%

Low‐Temperature Synthesis of Phase‐Pure 0D–1D BaTiO₃ Nanostructures Using H₂Ti₃O₇ Templates

et al. 2010

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One-dimensional (1D) barium titanate (BaTiO 3 ) nanowires, which were uniformly covered with 0D BaTiO 3 nanocrystals, were synthesized by using a simple solvothermal reaction of protonated trititanate (H 2 Ti 3 O 7 ) nanowires with barium hydroxide octahydrate [Ba(OH) 2 ·8H 2 O] at 80°C in ethanol/ water mixed solvent systems. The compositions of the mixed solvents Ϫ the volume ratio of ethanol to deionized water Ϫ was a key controlling parameter in order to determine the phase formation and primary particle size of the 0D BaTiO 3 nanocrystals. Single-phase cubic perovskite BaTiO 3 started

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Section: Resultsmentioning

confidence: 99%

Low‐Temperature Synthesis of Phase‐Pure 0D–1D BaTiO₃ Nanostructures Using H₂Ti₃O₇ Templates

et al. 2010

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“…18, was used as single-and multi-parameters for correlation analysis of log 10 K in various solvent mixtures. The computer program used can give the values of A 0 , a, b, p and some statistical parameters including the r 2 coefficient, the uncertainty value of any parameter (given in parentheses), and the overall standard error (ose) of log 10 K. The KAT parameters and the dielectric constant values for all the water-methanol or ethanol mixtures used in this work were obtained from the plot of each property versus the mole fraction of the organic solvent of the values that were reported in the literature for various percentages of aqueous solutions of methanol [26,29], those values are listed in Table 4.…”

Section: Solvent Effectmentioning

confidence: 99%

“…We used the GaussNewton non-linear least-squares method in the computer program to refine the log 10 K fits by minimizing the sum of the error squares from Eq. 19: [26] b The values are from reference [29] U = (log 10 K exp − log 10 K cal ) 2 (19) The procedure used in the regression analysis involves a rigorous statistical treatment to find out which parameter in Eq. 18 is best suited to the water-organic mixed solvents.…”

Section: Solvent Effectmentioning

confidence: 99%

Solvent Effects on Tautomeric and Microscopic Protonation Constants of Glycine in Different Aqueous Solutions of Methanol and Ethanol

et al. 2012

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The acid-base equilibria of glycine have been studied in different aqueous solutions of methanol and ethanol (0-45 % v/v) using a potentiometric method. In this study, the macro and micro protonation constants of the amino acid and its tautomeric constant have been determined at 25°C and constant ionic strength (0.1 mol·dm −3 NaClO 4 ). The protonation and the tautomeric constants of glycine in different binary mixtures were analyzed in terms of the Kamlet, Abboud and Taft (KAT) parameters. Single-parameter correlations of the constants versus α (hydrogen-bond donor acidity), β (hydrogen-bond acceptor basicity) and π * (dipolarity/polarizability) are poor in all solutions. Multi-parameter correlations show better results, but dual-parameter correlations represent significant improvements with regard to the single-and multi-parameter models. Linear correlation is observed when the experimental protonation constant values are plotted versus the calculated ones when the KAT parameters are considered. Finally, the results are discussed in terms of the effect of the solvent on protonation and tautomeric constants.

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“…Figure 2 shows the XRD patterns of the powders solvothermally prepared in various mixed solvents, pure water (E0H10), 20% (E2H8), 40% (E4H6), 60% (E6H4), 80% (E8H2) and pure ethanol (E10H0), at 120°C for 40 h. Although the SrTiO 3 (ST) phase did not form in pure ethanol due to the insolubility of Sr(OH) 2 ·8H 2 O, the perovskite cubic ST phase formed without secondary phase at 120°C when the ethanol concentration in the mixed solvent was >40 vol %, which was closely related to the low dielectric constant (¾) of each solvent (¾ ,water = 80, ¾ ,EtOH = 25). 19) Theoretically, a solvent with a low dielectric constant makes the solution more supersaturated, 20) and the relationship between the nucleation rate and supersaturation can be expressed using the Arrhenius rate equation.…”

Section: Photocatalytic Reactionmentioning

confidence: 99%

Synthesis and photoactivity of hetero-nanostructured SrTiO3

Lee

Cho

Yim

et al. 2010

J. Ceram. Soc. Japan

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A SrTiO 3 hetero-nanostructure was synthesized via solvothermal reaction using a protonated trititanate nanowire (H 2 Ti 3 O 7 ) and strontium hydroxide octahydrate (Sr(OH) 2 ·8H 2 O) in an ethanol/water mixed solvent system. The ethanol to deionized water volume ratio was the controlling parameters for determining the phase formation and the particle size of the SrTiO 3 nanocrystals. Single-phase cubic perovskite SrTiO 3 began to form at 120°C in a mixed solvent containing >40% ethanol by volume. Field emission scanning electron microscopy (FE-SEM) and high resolution transmission electron microscopy (HRTEM) showed that the as-prepared SrTiO 3 retained its wire-like (1D) morphology with nanocrystals (0D) on the surface. The synthetic mechanism of the 0D-1D SrTiO 3 hetero-nanostructures was demonstrated by topochemical reaction from dielectric tuning of the mixed solvent and the correlation between the crystal structures of SrTiO 3 and H 2 Ti 3 O 7 . Using as-prepared SrTiO 3 nanowires, the photocatalytic activity for the degradation of a rhodamine B dye solution was evaluated under UV irradiation and compared to SrTiO 3 powder from solid state reaction.

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The static permittivity of binary mixtures using an improved bruggeman model

Cited by 165 publications

References 7 publications

Low‐Temperature Synthesis of Phase‐Pure 0D–1D BaTiO₃ Nanostructures Using H₂Ti₃O₇ Templates

Low‐Temperature Synthesis of Phase‐Pure 0D–1D BaTiO₃ Nanostructures Using H₂Ti₃O₇ Templates

Solvent Effects on Tautomeric and Microscopic Protonation Constants of Glycine in Different Aqueous Solutions of Methanol and Ethanol

Synthesis and photoactivity of hetero-nanostructured SrTiO3

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The static permittivity of binary mixtures using an improved bruggeman model

Cited by 165 publications

References 7 publications

Low‐Temperature Synthesis of Phase‐Pure 0D–1D BaTiO3 Nanostructures Using H2Ti3O7 Templates

Low‐Temperature Synthesis of Phase‐Pure 0D–1D BaTiO3 Nanostructures Using H2Ti3O7 Templates

Solvent Effects on Tautomeric and Microscopic Protonation Constants of Glycine in Different Aqueous Solutions of Methanol and Ethanol

Synthesis and photoactivity of hetero-nanostructured SrTiO3

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Low‐Temperature Synthesis of Phase‐Pure 0D–1D BaTiO₃ Nanostructures Using H₂Ti₃O₇ Templates

Low‐Temperature Synthesis of Phase‐Pure 0D–1D BaTiO₃ Nanostructures Using H₂Ti₃O₇ Templates